Magnetizable element and process of treating same



July 2, 1929.

c. H. SEYMOUR 1.719.564

MAGNETIZABLE ELEMENT AND PROCESS OF TREATING SAME Filed April 4, 1927 INVENTOR. BY W M ATTORNEY netizable elements of an electro-magnetic de-- Patented July 2, 1929.

UNITED STATES PATENT OFFICE.

CHAQRLES H. SEYMOUR, OE KANSAS'CITY, MISSOURI Application filed April 4,

My invention relates to improvements in magnetizable elements and process of treating same.

It relates particularly to the treatment of soft iron which is to be used as the core of an electro-magnetic device, such as the core of the armature of an electric motor or dynamo, the core of a magnet, or the magnetizable element of a transformer.

One of the objects of my invention is to provide a novel magnetizable elementof the kind described, which is not susceptible to be ing heated to a high degree of heat by the action thereon of an energizing current in the operation of the machine of which the element forms a part.

A further object of my invention is to provide a novel process for reducing the susceptibility of a magnetizable element to heat- It further obj eet of my invention is to eliminate overheating and consequent possible damage and loss of power due to the magvice during its operation.

The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawing which illustrates my invention,

' Fig. 1 is a vertical sectional view of an apparatus adaptedvto carry into effect my im proved process.

Fig. 2 is a side elevation of an armature, the core of which embodies my improvement.

Fig. 3 is a side elevation of a magnet, the core of which embodies my improvement.

Similar reference characters designate similar parts in the different views.

I have found that by heating to a red heat a magnetizable body, such as the soft iron core of a magnet, dynamo or electric motor armature. or transformer, and then cooling the body by contact with an oleoresinous substance, prvferably turpentine, that the heat ing action of an energizing current on the core will be materially reduced.

In carrying my improved process into effect, the soft iron core 1, Fig. 1, of a. magnet or other electrical device is first heated red hot, preferably to at least a cherry red, and

1927. Serial No. 180,747.

then immersed, while so heated, in an oleoresinous material, preferably turpentine 2, which is held in any suitable container 3. v In order that the turpentine shall not become heated sufficiently to flash, the container may be cooled by any suitable means, such as by immersing the container 3 in water 4 contained in a suitable tank 5.

When the core 1 has been so treated and cooled, it will not afterwards become heated to any degree of heat sufficient to be damaging or to result in loss of power to any great extent, due to the action thereon of an energizing current, and such as occurs in cores which have not been so treat-ed.

In Fig. 2, is shown an armature core 6, which may be solid iron, and not composed, as usual, of laminations. Such an armature core when treated by my improved process will have its resistance to the heating action of an energizing current increased, so that it will not be necessary to make the core of laminations, thereby avoiding much expense in the cost of material and of labor in its manufacture.

I do not limit my invention to the specific steps described, as modifications, within the scopeof the appended claims, may be made without departing from the spirit of my invention.

lrVhat I claim is:

1. The process of treating a soft iron ele ment of an electro-magnetic device to reduce its susceptibility to heating, consisting in heating the iron to a red heat and then cooling by contact with an oleoresinous material.

2. The process of treating a soft iron element of an electro-magnetic device to reduce its susceptibility to heating, consisting in heating the iron to a red heat and then cooling it by contact with turpentine.

3. The process of treating a soft iron element of an electro-magnetic device to reduce its susceptibility to heating, consisting in heating the iron to a rod heat and then cool- 95 ing it by immersion in turpentine.

In testimony whereof I have signed my name to this specification.

CHARLES H. SEYMOUR. 

